Hose coupling



March 23, 1948. w, c, CALCOTT HOSE COUPLING Filed April 10, 1944 '2 SheetsSheei 1 INVENTOR.

* (/faffew a @0022 March 23, 1948.

w. c, CALCOTT HOS]; COUPLING Filed A ri1 10, 1944 2 Sheets-Sheet 2 INVENTOR. M7

Patented Mar. 23, 1948 UNITED STAT ES PAT ENT OFFICE 24325472 HOSE COUPLING} Walter G. Calcott, Maywood, 111., ssignor toChi= cago Metal Hose Corporation, Maywoocl-,- 111.,

a corporation of Illinois Application April-1'0; 1944, SeriaPNo; 530328 Y 14 Claims; (01. 285-130) This invention relates a to a hose coupling structures, particularly adapted for use with hose or tubing of the spiral'convolutedtype.

It is an object of the invention toprovide a hose or tubing coupling of 'the typestated; mmproved' construction andoperating characteris tics. More specifically statedit is; object of the invention to provide a hose coupling for spiral convolutedhose'or tllbinsa Whereinthefa turesof mechanical strength and resistance to tain preferred embodiments are" set forthfor purposes of illustration. v

In the drawings; wherein like reference nu merals refer to like parts throughout-i Fig. 1 is ageherlal assembly-view ofahose coupling, with its associated hoseor tubing; constructed in accordance with and i embodying the principles of the invention;

Fig. 2 is A alongitudinal l sectional' view; on an enlarged scale; of a portion of the" structure-'- shown in Fig. 1

Fig. 3 is-an exploded viewg more particularl'y' showing the details of -construction of some of the couplingparts';

Fig. 4 is a longitudinal sectional view of 'a coupling structu-reof modified'for'm; with its ass'o ciated hose or tubing; 7

Fig. 5 is a transverse sectional vie'w of the structure of Fig. 'onthe line 5'5- there'of Fig, 6' isaview similar to Fig;- 4; but'illusti"at-" ing a furtherimodifi'ed form of "coupling structure;

Fig. 7 isia: transverse sectional' vi'ew' of the structure otFigrfi; on the-line 1-! thereof Fig; 8 isza detail illustrativefview of the "con-'- pling anchor or'clamp members; constructed in a modified form; and.

Fig. 9: isfa" detail illustrativevlew showing thei members ofFig; 8; after they hav'e' been shaped into annular or ring-like form.

In the drawings the coupling structure 5 of' 'the invention has beenillustratedlcas i appli'ed to hose of thespiral strip type, as" various" features of the'structure" are particularly ad apted=' for use With this type ofhose o'r tubing. It is'tb b'e-un der'stood, however, that the invention iii other of its aspects, is adapted for use with other types of tubing such, for exam le, as"spiral' convoluted tubing formed from longitudinally seamed or' one-piece' cylindrical tubing stock.

Referring more particularly to the drawings;- and first tothe' embodiment shown in Figs; 1,2

and 3, th'e 'couplihg structures, generally iridi; cated by the numeral iii, are shown as applied for securing the ends of twohose or tubing' pi'eces Ii and i2; of thespiralstrip mechanicallyinter lockeuty'pe, togetheriria fluid-tight joint. As is well known in the art; tubin of this ty e is formed of a; spirally 'wouh'd elongated meta-1 strip SllchQfO'r example, as indicated at l3 in Fig. 2;

the juxtaposed stripedges l4- and 15' being brought into: intrengagirig or interlocked post:- tion whereby-to provide a flekibl'e tubing strucfi ture'; Generally-a cordor wir'e ofpacking, such asi ndicat'ed at I6, is"arrangd helically' anti-"dis posed within-'the connection at the' strip edges, whereby to facilitate the" provision of a" fluid tight'hcise structureI The packing may be metal wire; or may, for" example; be'asbestos; rubber; or other suitable packing-material;-

is encountered in providing a coupling structure;

which can be readily applied to the hose; and

tight coupling joint. Particularlyin the cas of the 'lar'ger nose izes, the c'oupli ng' is; subjected to a considerable ehd' thrust ten-ding toshear the coupling'off of the" hose end; when" the" nose is subjected to relatively high internal fluid pressures."

The coupling structu'reof the present invention" comprises a split ring interlocking member 20% best'show'n in perspective detail in Fig.3; adapted: to be threaded upon and- "interlocked" with thespiral convolutioris oftheho'se; to provide afposi'etive grip mechanical interlock betw e1r the seconvolutions' and "the coupling when the latter is in' assembled position." More particularly; the? ring 20 issp-ira1lyforiried of a pitch equa'l to that? of the hose convo1utiohs ;to'whic1j it sfi-to'b' ap plied, so'tl'ia-t-the ririg may be thr i hose end, into position a s illustratdifi Fig; 2 2x116; thus mechanical-1y interlocked with the spira hOSCOIIVU1litiOHSL Theiilnei' diairietefi' of th interlocking ring 2fl is substantially thesaifiQ as Z; the trough diameter'of the groove 2'l "of th'e' tubizig so that the ring lies within the groove, the outer diameter of the ring being somewhat greater than the outer diameter of the tubing so as to project radially therefrom a predetermined distance.

This radially projecting portion of the interlocking ring is adapted to be gripped between a pair of anchor or clamp members 22 and 23, also shown in perspective detail in Fig. 3. These anchor members, of annular sleeve-like form, loosely embrace the tubing, and are adapted to be brought into abutting engagement against the opposite side faces of the interlocking member 23. To this end the member 22 is provided with a helical side face 24 for co-mating abutting en gagement with one side of the ring 23, whereas the member 23 is similarly provided with a helically shaped side wall face 25, shaped to -corre--- I Preferablythe packing is so arranged that it spond to engage the opposite side of the ring 23, and corresponding to the pitch thereof. When the parts are in assembled position, as shown in Fig. 2, the stepped portions 26 and 27 of the an chor sleeves are in substantial alignment with the ends 28 and 23 of the interlocking ring.

An auxiliary coupling body member 32, L- shapedin cross section, embraces the hose inwardly of the anchor members, the body member being of such size as to have a sliding fit on the hose. Packing material 33, in the form of an annular sleeve, is interposed between the conical .end face 34 of the coupling body member 32, and the annularside wall portion 35 of the anchor sleeve 22. V

A maincoupling body 33 also embraces the hose with a sliding fit, this body member preferably havingan inwardly projecting flange 3? overlying the hose end, and a finished face 33 adapted to receive or abut a gasket 39, of suitable packing material. An annular sleeve member 4fi,pr,ojecting axially of the structure, is suitably secured to the body member 36 as by soldering or welding as indicated at 4|. The sleeve member 40 projects over and is adapted to have a sliding fit upon the axial body portion 42 of the auxiliary body member 32, the sleeve member terminating somewhat short of the radial flange portion 43 of the auxiliary body member so as to provide a clearance or adjustment space as indicated at 44. A transverse wall portion '43 of the main coupling body member is adapted to abut the annular wall surface 41, Fig. 3, of the annular member 23 T The main coupling body member is provided with a series of tapped bolt holes, as indicated at 49, in circumferentially spaced relationship, and the flange portion 43 of the auxiliary body mem ber is provided with a series of holes 53 in corre sponding circumferential relationship. A series of bolts or studs have their ends threadedly engaged into the holes 49, the bolts being respectively provided at their opposite ends with threaded nuts'52 for adjustably clamping the auxiliary body member 32 and the main body member 36 together. The main body member is also provided with a series of bolt holes 53, in circumferentially spaced relationship, for receivingbolts 54 whereby the coupling structure may beclamped against the gasket 39 and connected with a coupling structure or other end fitting to which it is adapted to be connected.

In assembling the coupling structure upon the hose end, the auxiliary body member 32 is first slipped into position, the packing 33 and the anchormember22 then being also slipped onto thehose end, into position as shown in Fig. 2. The interlocking ring 2 0 is then threaded onto the spiral hose convolutions, and the cooperating anchor member 23 brought into abutting position thereagainst. The main coupling body member 33 may then be placed into position, and the studs 5! and nuts 52 applied to clamp the parts together. It will be seen that as the nuts 52 are tightened on the bolts, the auxiliary body member 32 will be propelled toward the main coupling body member, causing the packing 33 to be compressed between the auxiliary body member and the anchor member 22, against the encircling sleeve member 43 and into tight gripping engagement with the outer surface of the hose wall. Additionally, the flexible packing will be forced into the spiral groove '2i of the tubing, as indicated at 53, whereby to provide a tight seal between the packing and the external surface of the hose.

extends "along an appreciable axial surface of the hose wall, as shown in Fig. 2, preferably having a length somewhat in excess of the pitch of the tubing convolutions, whereby to provide an effective seal and prevent fluid from creeping along the hose groove 2 l' through the packing.

The interlocking ring 20, being mechanically interlocked with the spiral convolutions of the hose, provides a firm anchorage for the coupling structure upon the hose end, preventing the cou-- pling from being sheared or thrust off of the hose end, even under high fluid pressures, andiin installations wherein the coupling structure is applied to hose of relatively large diameter; For.

example, in installations wherein the hose. diameter may be eight or ten inches, a size with which the coupling structure of the presentinvention may be readily used, it will be seen'that fluid pressures of perhaps one hundred pounds per square inch within the hose will produce a very considerable end thrust tending to shear the coupling structure off of. the end of the tubing. The interlocking ring 20, with the associated anchor members 22 and 23, providea firm positive mechanical grip of the coupling upon the hose, resisting these shearing forces. At the same time a fluid-tight seal is provided,

notwithstanding the helical groove 2| in the tub-' ing, which tends to promote leakage, andnotwithstanding the fact that it is generally impossible to cut a smooth end face upon thehose, for example as indicated at 58. More particularly, fluid tending to escape between the hose end face 58 and the coupling flange portion 3! is blocked from escaping outwardly of the sleeve 40 by the weld or solder joint 4|, and is blocked from escaping along the inner surface of the sleeve, or along the exterior surface: ofthe hose wall, or along the hose groove 2l',;by the relatively long compressed packing structure 33.

The bolts 5| with their associated adjustment nuts 52 provide a ready means for, compressing the packing and assembling the parts in position,

' and without the application of special tools. The

such as is likely to destroy the hose packing "l6 which, as previously stated, may be asbestos or rubber or other packing material subject to .deterioration when subjected to heat or the like. l

Referring to Figs; 8 and 9, amodified arrange ment is illustrated forforming the anchor m'em- The weld or soldered joint' lfwill excessive welding atesm bers' engageable with the interlocking ring. In this instance the anchor members are shown as being formed from initially fiat sheetmetal strips 22a and 23a. After stamping or otherwise cutting the strips into suitable size and shape, as illustrated in Fig. 8, they are shaped into annular form, asshown in Fig. 9, whereby to form the annular sleeve-like anchor members, similar in function and purpose to the anchor members 22 and 23 previouslydescribed. When in assembled position, the slit or end portions 60 and SI of the anchor members will be aligned with the slit or end portions 28a and 29a of the interlocking ring, as will be readily understood.

In Figs. 4 and 5 a modified embodiment of the invention is illustrated, which may be prefer ably used for smaller size installations, as compared with the embodiment of Fig. 2, which may for example be preferably used with larger installations.

Referring to the structure of Figs. i and 5, the anchor members 221) and 23?), adapted to engage the opposite faces of the interlocking ring 201), are illustratedas being of the type shown in Figs. 8 and 9, formed from initially flat elongated strips. It is to be understood, however, tha e nt nue s n u r a ho m m as shown in Fig. 2, may be interchangeably used, if desired. In this structure the auxiliary coupling body member, as shown at 32b, is provided with an elongated axial skirt portion E 'l, serving the function and purpose of the cylindrical sleeve member A!) in the embodiment of Fig. 2. This axial skirt portion is provided on its enlarged end 65 with n internal threaded bore adapted for threaded engagement with an axially extending flange portion 66 formed on the main cou pling body member 35?). A packing member, as shown at 67, may be clamped between the end face of the skirit portion 65 and the radially extending flange portion 68 of the main body member, whereby to provide a fluid-tight joint between the threaded parts. To facilitate threaded adjustment of the main and auxiliary body members, the enlarged skirt portion of the latter may be polygonally shaped as best shown in Fig. 5. An elongated packing 3%, similar in structure and purpose to the packing 33 previously described in reference to the embodiment of Fig. 2, is clamped between the inwardly directed flange portion 69 of the auxiliary body member and the anchor member 22b, as will be understood.

It is believed that the manner of operation of the structure of Figs. 4 and 5 will be clear from what has heretofore been said in reference to Fig. 2. As stated, the structure of Figs. 4 and 5, and the threaded connection provided, may be preferable for use with hose installations of smaller sizes.

In Figs. 6 and 7 an embodiment is illustrated generally similar to that shown in Figs. 4 and 5, except that in this instance the main coupling body member 360, instead of being provided with a radially extending flange, such as shown at 68 in Figs. 4 and 5, and associated bolt holes, is provided with an axially extending threaded portion 12, adapted for co-mating threaded engagement with a suitable end fitting or the like. It thus will be seen that the main coupling body member may be variously shaped and arranged, in accordance with the requirements of any particular installation.

It is obvious that various changes may be made in the specific embodiments set forth for the pur- 6 poses of illustration without departing from the spirit of the invention. The invention is accord'e ingly not to be limited to the specific emb.odi-. ments shown and described, but only as. indicated in the following claims. I

The invention is hereby claimed as follows:

1. A coupling structure for hose ofthe metal convoluted type, said coupling comprising a split ring interlocking member adapted to embrace the. hose and mechanically interlock with the. convolutions thereof, an anchor member slidably embracing the hose and adapted to. engage the interlocking member and be held in placethereby, and a coupling body member retained on the hose by the anchor member.

2. A coupling structure, for hose, of the spiral convoluted type, said coupling comprising. ameniber having a helical ring-like portion adapted to embrace the hose and mechanically interlock with the spiral convolutions thereof, an anchor member slidably embracing thev hose and having a helical surface adapted to engage and coemate with the interlocking member and be held in place thereby, and a coupling body member. retained on the hose by the anchor member.

3. A coupling structure for hose. of the metal convoluted type, said coupling comprising a split ring interlocking member adapted to embrace the hose and mechanically interlock with the convolutions thereof, an annular packing adaptedto. grip the external surface of the hose, and a coil pling body member cooperable with the packing, said body member and packing being retained on the hose by the interlocking member.

4. A coupling structure for hose of the spiral convoluted type, said coupling comprising an interlocking member having a helical split ring portion adapted to embrace the hose and mechanically interlock with the convolutions thereof, an annular packing member adapted to grip the external surface of the hose, and a coupling body member cooperable therewith, said body member and packing being retained on the hose by the interlocking member.

5. A coupling structure for hose of the metal convoluted type, said coupling comprising an interlocking member adapted to engage the hose and mechanically interlock with the convolutions thereof, a pair of anchor members slidably engageable with the hose and adapted to abut the opposite sides of the interlocking member and be held in place thereby, a packing for sealing the hose, and a coupling body structure cooperable:

therewith and with the anchor members.

6. A coupling structure for hose of the metal. convoluted type, said coupling comprising a split. ring interlocking member adapted to embrace the:

hose and mechanically interlock with the convolu-- tions thereof, a pair of annular anchor members: slidably engageable with the hose and adapted to abut the opposite sides of the interlocking member and be held in place thereby, an annu-- lar packing member, and a coupling body structure for holding the packing member and anchor members in operative juxtaposition.

7. A coupling structure for hose of the spiral convoluted type, said coupling comprising a helical ring-like interlocking member adapted to embrace the hose and mechanically interlock with the spiral convolutions thereof, a pair of annular anchor members slidably engageable with the hose and adapted to abut the opposite sides of the interlocking member and be held in place thereby, an annular packing member engageable with the external surface of the hose, a pair of coupling body members disposed on opposite sides of the packing and anchormembers', and'means for urging the body members relatively toward each other to clamp the packing and anchor members in position on the hose; V

8. A coupling structure as defined in claim], wherein said urging means comprises a series. of bolts connecting the body members and disposed in circumferentially spaced relation thereon.

9. A coupling structure as defined in claim '1, wherein said urging means comprises a pair of co-mating annular threaded portions on the body members. '1

10. A coupling structure for hose of the .metal convoluted type, said coupling comprising an .interlocking member adapted to engage: the hose and mechanically interlock with the convolutions thereof, an anchor member slidably engageable with the hose and having a surface complementary to and directly engaging the interlocking member to .be held in place thereby, a packing engageable with the exterior surface of the hose, and a, coupling body member, said anchor member and body member being cooperable with the packing to effect the compression thereof. onto :the hose, and said anchor member, body member, and

packing being retained on the hose by the inwherein said sleeve-like packing member has a the packing, said anchor member having a he1i- V cal portion cooperable with the interlocking member and anannular portion cooperable with the packing,'and said interlocking member and anchor member serving to hold the packing on the hose in spaced relation from the hose end. i

' 12. A coupling structure as defined in claim 11,

length greater than the pitch of the hose-o,

13. A coupling structure for a hose of the spiral convoluted type, said coupling comprising a packing in sleeve-like form adapted to embrace the external surface of the hose, and a relatively flat helical ring interlocking member for holding; the packing on the hose and in spaced relation from the hose end, said interlocking member having a helical portion adapted to embrace and mechanically interlock with the spiral convolutions of the hose;

14.. A couplingstructure asdefined in claim], wherein each of said anchor members is provided.

with a circular surface along one edge portion and a helical surface along its other edge portion complementary to the helical interlocking member. r

WALTER C. CALCOTT;

REFERENCES CITED The following references are of record in the file of this patent: V

UNITED STATES PATENTS j Great Britain 1914 

